import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
@WebServlet(urlPatterns = "/hello",name = "/hello")
public class HelloWorld extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException,
            IOException {
        //指定对应的内容和编码方法
        resp.setContentType("text/html;charset=utf-8");
        //向页面中写文字
        PrintWriter writer = resp.getWriter();
        writer.write("<h1>你好世界</h1>");
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException,
            IOException {
        this.doGet(req, resp);
    }
}
